“I often wonder if Serbs had sided with the Nazis...”
Some did:
http://en.wikipedia.org/wiki/Serbian_State_Guard
http://en.wikipedia.org/wiki/Serbian_Volunteer_Corps_(World_War_II)
http://en.wikipedia.org/wiki/Yugoslav_National_Movement
http://en.wikipedia.org/wiki/Chetniks#Axis_collaboration
This wasn’t a funeral. One where he died in a state of repentance. This was a mass to remember a Nazi, inside the church. Disgusting.
And he fled to Argentina and never repented. Conventionally he would be an odd person for the church to host memorial masses for. Unless of course,,,they were old friends.